Sign board



FIG. 1 is a perspective view of a sign board showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof, the top being a mirror image thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left end elevational view thereof; and

FIG. 6 is a right end elevational view thereof. 

The ornamental design for a sign board, as shown and described. 